High-discharge and low-charging mixer



y 3, 1951 Y E. H. LICHTENBERG 2,558,765

HIGH-DISCHARGE AND LOW-CHARGING MIXER. I

Filed Aug. 6, 1946 2 Sheets-Sheet 1 a lwarlTgk E:

ATTORNEYS July 3, 1951 E. H. LICHTENBERGY 2,558,765

HIGH-DISCHARGE AND LOW-CHARGING MIXER Filed Aug. 6, 1946 2 Sheets-Sheet 2 INVENT R BY m a ATTORNEYS Patented July 3, 1951 I HIGHJIISCHAR'GE AND LOW-"CHARGING MIXER i-Eric H; Lichtenberg,; Milwaukee, Wis., assignor ,to ,Koehring. Company Milwaukee, Wis., a corporation Ap'plicationAugust 6, 1946; Serial Nev-88,613

.5 Claims.

1 present .SinVeHtiOII-J comprises a" novel type of low charging and highgdisicharging ;mixing amachine of a1type::.common-l-y.=known-:asra tilting s-mixer.

In the customaryformsyof' tilting m-ixersuherezztofore. used intthe art, therecis employed a'itiltand is: normallyiiclosedrat 1011B? end but open at -the "other end. 't'I'he 'open end of'the -'drum is nusedf'ior charging and xid-ischarging ;-the drum,

.echargingizwhen'thez said :open endis tilted upper-' :ymost andrdischargingwhen'thesaid openend is itilteda in adownwardly-inclined position of the *drum,1ithe'=body of which gusuallytapers toward .'said chargingand zdischargingq opening or end.

"Now'bysreasoniofthe fact that-the tilting mix :ing drum r usually 1 tilts about a fixed axisp-while '"it:readi-lydischarges cwhen theropen end isin earrelatively loW-psition,=when the mixing'drum -.is :in a :mixingand charging ,position,-..-the 013611- :ing through which .the -materials are charged iinto the; drum :is relatively high, necessitating that' the user employ:v :shoveling means or a loadingeskipvin-orderitowraise the materialato the necessary heightfor charging the drum.

According w-to the improved construction ;of

mixer of my present invention, however,- I; em- 1ployr a=drumwcarrier orwarm for. supporting the -mixing t'drum, :while being constantly 'rotated, :either'ima W:charginga-position' or in a high :dischargingposition. 'The purpose;of the provisions to t the above 'end is to-enable materials broughtupqto charge .the drum ,-.--say in a wheel- :barrow, T'tO -be directly charged into. -the .-drum from the wheelbarrow, without ;shove1ling, and when thezmateria'ls; have been sufiiciently.mixed or agitated incident to the--rotative movement got the .drum, therlatter maybe shifted to. ahigh .discharging ;';position--- and discharged ,=into-whee1- barrows: directly accordingetoepresent practice. With the use. of .emy present rovements in g tilting 7' mixers of the class-referred to,: the .IIGCBSSHYIOI shovelling materials from the-supply source or; lifting theme-to a rihigh point to charger-into thehopen; end of the drum, either by a shovelling means-,brra loading skip of some i kind;is-rentirelyrobviated.

llahave embodiedsmy invention; in two preferred 'v-forms ;.or types of --construction, an understand- :ring; 0f- -Whicmwihnbe had-upon reference to the following-.fdetail *description, in conjunction :w-ith ":the' accompanyingsdrawings, in which:

f-Eigure lis:a rearvviewvof-qa side discharge type ofr-mixingiunitpf the; tiltingidrum c lass,;-embodying:itheaessential: features 0f :mY: invention.

FiguregZ iszia sideiw wsofsxthe sam 2 Figure 3 is a side view of a modification of my iinvention .,in x. which the mix,in .\,dr u1 n umay be characterized. as.;.an end ,charging, and A discharging.-type.of.,dr11m,.in relation to themq ll t- 1 ing onsthe machine.

,Eigurer l. is aqsectionalryiew .of ,the machine -shown-. in ,.the. mo.dificatio n of Figure'3, on the =1ine 4+4. of,FZigure C3.

li'igure. -5 is. a. sectional view. taken,. on the line =..5=-.5,.approximately, of Figure 3..

.Eigure ,6; is.-. a. sectional view of the trunnion :operating gearsand l-trunnionmtaken 7. about u on -the.line.-.6==,5,of. Figlll-QB.

- -Fir.st, referring ,to the. construction of my invention emhodied in Figures 1 ..and 2 of the drawings, itiis noted, that the fmme construc- .tionr. ofnny .mlxing machine ,may be largely ,of conventionaltype, including, the-fi /mepr chassis .Linountedpn rubber tired or. therwiseequipped 0 ,wheels z. Extendin in.onedirection from the portable frame or chassis is a tow pole 3 adapted -,.to,be hitchedltoi-a,pulling machine or truck in ..the rcustomary away, and. extending from the chassis l w in. aldirection opposite the tow pole 3fiare the legs A having the, feetilld to. rest upon athew r und, -.s i e s and feet "bein rori .to prevent- ;ti pping. of the machine iear wardly ..-.as seenin Figure 2.

; On.,the chassis I. is,,carried.a, suitable engine .0r motor 5 y. having itsl engine ,shaft. 5 equipped ,,.with..a .pu-lley,'l,. or sprocket, ifdesired, which .pulley l,. is..connected,hby a belt or chain}v with ..a.,driven pulley 9 elevated from the pulley I and mountedlupon a, mixingdrum rotating shaft I 0 carried by suitable bearingsinthe framework of .the machineasuperposed upon the chassis i. It is contemplated in. the ordinary operation of the machine. that thesha ft It shall constantly .irotate and corresponding1y constantly rotate 40\ the mixin drum I l.

.T-he mixing .drum. iL-iscarried by. an angular .arm 12 comprising a vertical-portion J3 which -is-..loosely ..mounted .l -DQn the, shaft .v l8, .and, a horizontal portion I 4wat ..the.. outboard .c end of which is. provided. a suitable-bearing l5, or trun- -l 8 being mounted upon a asuitable shaft vI 9. supportedv in a suitablegbearing on. the. yer-tical. portion; of .theaarmlfl. iTheishaft [9 not .only ,carries the sprocket 718; fixed thereto, but also .carries,-.- keyedztheretor a. (bevel orzsimilargear 2 0 that engages a bevel ring gear 2! which encircles the drum ,1 I and. fixed ,thereto..-after.known manner of construction of tilting drums of the general class of my drum as used in tilting mixers.

Thus it will be seen that during the constant rotation of the shaft H] the drum l I will be correspondingly constantly rotated about the trunnion or axis I5 previously referred to.

As noted before, the arm 12 at its vertical portion is loosely carried by the shaft in, said shaft thus providing only a bearing for the rotation of the arm !2 from the upper full line discharging position of Figure 2 to the lower charging position which is illustrated in dotted lines in Figure 1.

I provide suitable means for effecting the desired rotation of the arm I! to carry the drum H from charging or low position to discharging or high position, during the rotation of the drum about the axis 15, and such means will now be described.

Fixed to the shaft H] and therefore coaxial with the pulley 9 is a drive gear 22 which is a relatively small gear and meshes with the large driven gear 23. The driven gear 23 is mounted upon a suitable shaft 24 carried by the framework of the machine in a. suitable bearing, and the shaft 24 has the gear fixed thereto and is equipped at its outer end with a loosely mounted brake and clutch drum 25 normally disconnected from the shaft '23 but adapted to be connected for rotation with the shaft by means of the clutch member 26 which is mounted uponsaid shaft 24 and splined thereto for sliding movement. The brake and clutch drum 25 is equipped with a driving pinion 21 at its outer side and which may be integral therewith, said pinion being adapted to engage at its teeth with a toothed sector 28 fixed to the arm !2 at the inner side of the latter by any suitable means such as bolts or the like.

The combined brake and clutch unit, including the drum 25 and the clutch member 26, may be generally of the type shown in Lichtenberg Patent No. 1,328,635 issued January 20, 1920, and therefore includes an operating lever 26a which, when moved in one direction, will clutch the brake drum 25 to the shaft 24 for turning with the latter, thereby to turn the pinion 21 and the gear member '28, and when said lever is moved in the opposite direction, the shaft 24 will be unclutched by the opposite movement of the clutch member 26 and the driving of the brake drum and the pinion 21 will be discontinued, and brake band 25a applied.

Of course, when the pinion 21 is driven it imparts movement to the gear or sector member 28 which in turn, being fixed to the arm [2, will rotate the arm l2 about the axis shaft It). This rotation thus produced will turn the arm 12, and

thereby rotate the axis arm I4 for the drum, 3

so as to carry the drum H from a low charging position to a high discharging position, while the drum is continuously rotating. And when the drum has emptied of its material 'at its high discharging position, the release of the brake 25a by the lever 26a will permit gravitation of the drum under braking control to its lowermost, or charging, position. By reason of the use of the clutch and brake unit 25, 26, 25a, 26a, the clutch 26 may be engaged for the elevating movement of the drum and after discharge of the drum l l, the throwing out of the clutch will of course automatically apply the brake band 25a to the drum '25.

It will be quite apparent from the foregoing that when the drum II is in its low charging po sition with its open end inclined upwardly, the batch of materials, properly proportioned, may be wheeled up to the drum in a wheelbarrow and dumped directly from the wheelbarrow into the drum. Likewise, by reason of the shifting of the drum to its higher discharge position, :as described previously, the drum may be arranged in a reverse position, that is with its open end downwardly, at such an elevation that a wheelbarrow placed beneath the drum will receive the mix-ed materials therefrom. There is no need for using a loading skip with my invention, nor is there any requirement that the workmen filling the drum shallhave to shovel the aggregates to be mixed therein and raise them manually to the height necessary to charge the drum when it has its charging opening uppermost, such position really being the mixing position, according to the known types of tilting drum mixers heretofore employed.

I next proceed with a description of the modification of my invention shown in Figures 3 to 6 inclusive of the annexed drawings.

In this construction the chassis of the mixer is designated 30, the supporting wheels 3|, the tow pole 3 2, and the anti-tipping legs 33.

On the chassis I is supported the engine 34 connected by transmission gearing in a box 35 with the driving shaft 35 carrying a sprocket connected by sprocket chain 31 to a cooperating sprocket mounted on the front end of the mixer rotating driving shaft 38. In this construction of my invention the mixing drum carrying arm is designated 39 and is curved so that its mixer bearing and trunnion 49 extends at an angle to the. arm 39 in such a manner that the drum designated 4| will assume substantially the angles required so that the drum charging opening inclines upwardly when the drum is in a charging position, and the discharging end of the drum inclines downwardly when the drum 4| is elevated to its discharging position at the higher elevation as indicated according to Figure 3 by the full and dotted lines showing positions of the drum.

The drum arm 39 that supports the drum 4| is carried by, or is a part of, the trunnion member 42 which is mounted in suitable encircling bearings 43 and 44 carried by the framework 45 of the machine. Turning of the trunnion member 42 will of course turn the arm supporting the drum after the manner illustrated in Figure 1 by dotted and full lines.

The drum rotating shaft 38 is mounted at one end, near the chain 31 in suitable bearing means 46 including a bearing which is supported by spider arms inwardly arranged in the front end of the trunnion member 42 which is hollow. The shaft 38 at the opposite end is mounted in a suitable bearing 41 provided on the arm 33 and at this end the shaft 38 is connected by a universal joint 48 with a driven shaft 49 having a bevel gear 50 which engages the bevel gear ring 5| encircling the drum 4!.

As seen best in Figures 3 and 5, a brake band 52 surrounds the trunnion member 42 above the transmission gear box 35, and is operated for application of the brake band to the trunnion member by means of a hand lever 53, see Figures 3 and 5. -A screw portion 54 of the lever shaft 55 will tighten the brake band 52 on the trunnion member 42 and hold said trunnion member with its arm 39 and mixing drum 4| in a stationary position. When the lever .53 is :ageacrzcu '8 moved inan opposite=di'reetiom the-ibrake band 52 vwill be loosened and enable the free-mutation :of-;-the trunnion member :42 .;as.{-:-for thee-lowering movementzof the drum 4.! :afterfit hasabeen-qdis- -ic'harg ed..

.The transmission gearing, inmthe gearbox 1'35 -drivese-a..lower gear 55. and,.-an:'.upper-;1 gear 51, ,ithe latten being mounted-upon the-trunnion member'42 and fixed to the latter. "The ears 56 and 51 constituteitheydriving means from the vengine 34 for turningthe trunnion, and

thereby rotating the arm "'39l'to4raise andl lower ilthe mixing drum "41.

the direction of movement for actuating the 'mach-ina a ssupporting- :frame, a motor -;thereon,

clutch arm 60 to cause rotation of the drum by the arm 39 to its uppermost position, the brake 52 will remain released, and then when the arm 39 and the drum 4! reach their uppermost position, the reverse throw of the lever 53 to unclutch the gears 56 and 51 from the drive will in relation to Figures 1 and 2, both machines having the same advantages, though the mechanical devices for controlling the operation of the two machines are somewhat different as set forth in the drawings. The link 59 is provided with a slotted connection to the arm 58 so that when the arm 58 is raised the clutching of the gears 51 and 56 will be performed, and when the arm 58 is lowered the brake band may be ap-, plied whilst the clutch means to the gears 56 and 51 is released.

The swinging arm in both constructions of my machine as described carries stationary bracket arms or members 63 which support a charging chute 62 fitting into the opening of the drum and about which chute the drum rotates. This chute is desirable to assist in charging the drum from a wheelbarrow filled with a batch of dry aggregates, when said wheelbarrow is tilted up to charge the drum with said aggregates, water being separately supplied to the drum. Under some conditions the chute 52 may be dispensed with.

The mounting of the drum II on the arm l3, and relation of the latter to its axis 19, are such that the weight of the drum will tend by gravitation to cause the drum to move from its dotted line position to its full line, as seen in Figure 3.

The brake and clutch unit 25, a, 26, 25a. of Figures 1 and 2 is only generally shown because it may be of various types, one of which is exemplified in the Patent 1,328,635 before identified.

The clutch operated by arm 60, Figure 3, may be of any conventional type. Also, the mixer 4| is so mounted that it may make a complete revolution from charging to discharging, and back to charging positions. The return movement may be gravitative, too, under the control of the brake and clutch features employed for holding and actuating the drum.

Having thus described my invention, what I am arm moun ted 'ftorswing:v about an axis i'to acarry its free end IPOm aL IOWi-tO a ,highipositiongand :vice .mixingedrumonthe free end'ofs=the.; arm -an'd fhav ing at-charging. and! discharge-opening, :mea-ns' towzro'tate thedrum, and :means to adrive tthe a-rm to ca rry the 2arm1to .a position in which ithe mixingdrum :opening is downward sforidiscc'harging, and zl'fon controlling: downward move-- mentdf thearm tocarr y same. to acposition-wi-th I the drum opening upward for charging, the' last means-*comprising operating devices to positively raise the drum, and means for releasing the drum from the drunr"raising'-means and for conro li eeravitat onzMaths-dru :todowachar ins position, including manually;rcontrolledwiclutbh driven means to raise the drum to discharge position, and brake controlling means for governing movement of the drum to low charging position.

2. In a high discharge and low charging mixing'machine, a trunnion member, an up and down movable arm carried thereby movable in a vertical plane, and extending laterally from the trunnion member, a mixing drum open at one end for charging and discharging and having its opposite end rotative upon the free end a ing machine, a trunnion member, an up and down movable arm carried thereby movable in a vertical plane, and extending laterally from the trunnion member, a mixing drum open at one end for charging and discharging and having its opposite end rotative upon the free end of the arm, actuating means to move the trunnion to shift the arm to carry the drum from a lowered charging position with its opening facing upward to an elevated discharging position with the opening facing downward, brake means coacting with the arm to control its lowering movement, clutch means to render the actuating means efiective, and driving means operated by the actuating means and passing through the trunnion, and gearing connecting the driving m eans to the drum to rotate the latter.

4. In a high discharge-and low charging mixing machine, a trunnion member, an up and down movable arm carried thereby, movable in a vertical plane, a mixing drum having a charging and discharging opening, means for mounting said drum angularly on said arm, said opening lying between the trunnion and the mounting means, means to maintain said drum in a position with the said opening upward while the arm is lowered, means to rotate the drum on the arm for mixing operation, when the arm is lowered and stationary, and means to swing said arm to thereby carry the mixing drum from a lowered position with its said opening upward in charging position, to a higher position with said opening downward in discharging position.

5. In a high discharge and low charging mixing machine, a trunnion member, an up and 7 down movable arm carried thereby in' a vertical plane, and extending laterally from the trunnion member, a mixing drum open at one end for charging and discharging, means for mounting said drum at an angle on the free end of said arm, with the opening therein lying between the trunnion and the mounting means, actuating means to move the trunnion to shift the arm to carry the drum from a lowered charging position with its opening facing upward to an elevated discharging position with the opening facing downward, means to hold the arm stationary, and means to rotate the drum while the arm is stationary. v I

' ERIC H. LICI-ITENBERG.

file of this patent:

Number 842,902 849,749

Number 8 UNITED STATES PATENTS I Name Date McArthur Feb. 5, 1907 Von Siller July 28, 1908 Jaeger May 2, 1922 Johnson July 25, 1922 Piispanen June 14, 1932 Gaertner Apr. 2, 1946 FOREIGN PATENTS 1 Country Date Italy Aug. 30, 1930 France May 1, 1906 

